On a remote outpost of the Galapagos, where Darwin received his first inklings of the theory of evolution, two scientists, Peter and Rosemary Grant, have spent 20 years measuring the beaks of generations of finches--to prove that Darwin did not know the strength of this own theory. "Spark(s) not just the intellect, but the imagination."--Washington Post Book World.

On a remote outpost of the Galapagos, where Darwin received his first inklings of the theory of evolution, two scientists, Peter and Rosemary Grant, have spent 20 years measuring the beaks of generations of finches--to prove that Darwin did not know the strength of this own theory. "Spark(s) not just the intellect, but the imagination."--Washington Post Book World.